/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
#ifndef CORE_RENDER_PAGE_RENDER_PAGE_H_
#define CORE_RENDER_PAGE_RENDER_PAGE_H_

#include <atomic>
#include <cmath>
#include <map>
#include <string>
#include <utility>
#include <vector>

#include "render_page_base.h"
#include "core/css/constants_value.h"

namespace WeexCore {

    class RenderAction;

    class RenderObject;

    class RenderPage : public RenderPageBase {
    private:
        void TraverseTree(RenderObject *render, long index);

        void SendCreateBodyAction(RenderObject *render);

        void SendAddElementAction(RenderObject *child, RenderObject *parent,
                                  int index, bool is_recursion,
                                  bool will_layout = true);

        void SendAddChildToRichtextAction(RenderObject *child, RenderObject *parent, RenderObject *richtext);

        void SendRemoveElementAction(const std::string &ref);

        void SendRemoveChildFromRichtextAction(const std::string &ref, RenderObject *parent, RenderObject *richtext);

        void SendMoveElementAction(const std::string &ref,
                                   const std::string &parent_ref, int index);

        void SendLayoutAction(RenderObject *render, int index);

        void SendUpdateStyleAction(
                RenderObject *render,
                std::vector<std::pair<std::string, std::string>> *style,
                std::vector<std::pair<std::string, std::string>> *margin,
                std::vector<std::pair<std::string, std::string>> *padding,
                std::vector<std::pair<std::string, std::string>> *border);

        void SendUpdateRichtextChildStyleAction(RenderObject *render, std::vector<std::pair<std::string, std::string>> *style, RenderObject *parent,
                                                RenderObject *richtext);

        void SendUpdateAttrAction(
                RenderObject *render,
                std::vector<std::pair<std::string, std::string>> *attrs);

        void SendUpdateRichtextChildAttrAction(
                RenderObject *render,
                std::vector<std::pair<std::string, std::string>> *attrs, RenderObject *parent, RenderObject *richtext);

        void SendAppendTreeCreateFinish(const std::string &ref);

        void LayoutInner();

    public:
        explicit RenderPage(const std::string &page_id);

        ~RenderPage();

        void CalculateLayout();

        bool CreateRootRender(RenderObject *root);

        bool AddRenderObject(const std::string &parent_ref, int insert_posiotn,
                             RenderObject *child);

        virtual bool RemoveRenderObject(const std::string &ref) override;

        virtual bool MoveRenderObject(const std::string &ref, const std::string &parent_ref, int index) override;

        virtual bool UpdateStyle(const std::string &ref,
                                 std::vector<std::pair<std::string, std::string>> *styles) override;

        virtual bool UpdateAttr(const std::string &ref,
                                std::vector<std::pair<std::string, std::string>> *attrs) override;

        virtual void SetDefaultHeightAndWidthIntoRootRender(
                const float default_width, const float default_height,
                const bool is_width_wrap_content, const bool is_height_wrap_content) override;

        virtual bool AddEvent(const std::string &ref, const std::string &event) override;

        virtual bool RemoveEvent(const std::string &ref, const std::string &event) override;

        virtual bool CreateFinish() override;

        void Batch();

        void LayoutImmediately();

        void SendUpdateAttrAction(RenderObject *render,
                                  std::map<std::string, std::string> *attrs);

        virtual RenderObject *GetRenderObject(const std::string &ref) override;

        void SetRootRenderObject(RenderObject *root);

        // ****** Render object managing ****** //

        void PushRenderToRegisterMap(RenderObject *render);

        void RemoveRenderFromRegisterMap(RenderObject *render);

        // ****** Life Cycle ****** //

        void OnRenderPageInit();

        void OnRenderProcessStart();

        void OnRenderProcessExited();

        void OnRenderProcessGone();

        virtual void OnRenderPageClose() override;

        // Re-apply raw css styles to page and trigger layout
        virtual bool ReapplyStyles() override;

    public:

        inline bool is_dirty() { return this->is_dirty_.load(); }

        void set_is_dirty(bool dirty);

        inline void set_is_render_container_width_wrap_content(bool wrap) {
            this->is_render_container_width_wrap_content_.store(wrap);
        }

        inline bool is_render_container_width_wrap_content() {
            return this->is_render_container_width_wrap_content_.load();
        }


        virtual float GetViewportWidth() override { return viewport_width_; }

        virtual void SetViewportWidth(float value) override { viewport_width_ = value; };

        virtual bool GetRoundOffDeviation() override { return round_off_deviation_; }

        virtual void SetRoundOffDeviation(bool value) override { round_off_deviation_ = value; }

        virtual float GetDeviceWidth() override { return device_width_; }

        virtual void SetDeviceWidth(float value) override { device_width_ = value; }

        inline float viewport_width() const { return this->viewport_width_; }

        inline void set_viewport_width(float viewport_width) {
            this->viewport_width_ = viewport_width;
        }

        inline float device_width() {
            return this->device_width_;
        }

        inline void set_device_width(float device_width) {
            this->device_width_ = device_width;
        }

        inline bool round_off_deviation() const { return this->round_off_deviation_; }

        inline void set_round_off_deviation(bool round_off_deviation) { this->round_off_deviation_ = round_off_deviation; }

        inline bool reserve_css_styles() const { return reserve_css_styles_; }

        inline void set_reserve_css_styles(bool value) { reserve_css_styles_ = value; }

        inline void set_before_layout_needed(bool v) { is_before_layout_needed_.store(v); }

        inline void set_platform_layout_needed(bool v) { is_platform_layout_needed_.store(v); }

        inline void set_after_layout_needed(bool v) { is_after_layout_needed_.store(v); }

    public:
        static constexpr bool kUseVSync = true;
        std::atomic_bool need_layout_{false};
        std::atomic_bool has_fore_layout_action_{false};

    private:
        RenderObject *render_root_ = nullptr;
        std::pair<float, float> render_page_size_;
        std::map<std::string, RenderObject *> render_object_registers_;
        std::atomic_bool is_dirty_{true};
        std::atomic_bool is_render_container_width_wrap_content_{false};
        std::atomic_bool is_render_container_height_wrap_content_{false};
        std::atomic_bool is_before_layout_needed_{true};
        std::atomic_bool is_platform_layout_needed_{false};
        std::atomic_bool is_after_layout_needed_{true};
        float viewport_width_ = -1;
        float device_width_ = -1;
        bool round_off_deviation_ = kDefaultRoundOffDeviation;
        bool reserve_css_styles_ = false;
    };
}  // namespace WeexCore

#endif  // CORE_RENDER_PAGE_RENDER_PAGE_H_
